/******************** (C) COPYRIGHT 2020 SONiX *******************************
* COMPANY:			SONiX
* DATE:					2020/06
* AUTHOR:				SA1
* IC:						SN32F780/790
* DESCRIPTION:	SPI0 related functions.
*____________________________________________________________________________
*	REVISION	Date				User		Description
*	1.0				2020/06/24	SA1			1. First release
*
*____________________________________________________________________________
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS TIME TO MARKET.
* SONiX SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL 
* DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT OF SUCH SOFTWARE
* AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN 
* IN CONNECTION WITH THEIR PRODUCTS.
*****************************************************************************/

/*_____ I N C L U D E S ____________________________________________________*/
#include <SN32F280.h>
#include "SPI.h"

/*_____ D E C L A R A T I O N S ____________________________________________*/

/*_____ D E F I N I T I O N S ______________________________________________*/

/*_____ M A C R O S ________________________________________________________*/

/*_____ F U N C T I O N S __________________________________________________*/

/*****************************************************************************
* Function		: SPI1_Init
* Description	: Initialization of SPI1
* Input			: None
* Output		: None
* Return		: None
* Note			: None
*****************************************************************************/
void SPI1_Init(void)
{
	//Enable HCLK for SPI1
	SN_SYS1->AHBCLKEN_b.SPI1CLKEN = 1;							//Enable clock for SPI1.

	//SPI1 setting
	SN_SPI1->CTRL0_b.DL = SPI_DL_8;									//3 ~ 16 Data length
	SN_SPI1->CTRL0_b.MS = SPI_MS_MASTER_MODE;				//Master/Slave selection bit
	SN_SPI1->CTRL0_b.LOOPBACK = SPI_LOOPBACK_DIS; 	//Loop back mode
	SN_SPI1->CTRL0_b.SDODIS = SPI_SDODIS_EN; 				//Slave data output 
																									//(ONLY used in slave mode)
	__SPI1_DATA_FETCH_HIGH_SPEED;									//Enable if Freq. of SCK > 6MHz
	
	SN_SPI1->CLKDIV_b.DIV = (SPI_DIV / 2) - 1;			//SPIn clock divider

	//SPI1 SPI mode
	SN_SPI1->CTRL1 = mskSPI_CPHA_FALLING_EDGE|			//Clock phase for edge sampling
									 mskSPI_CPOL_SCK_IDLE_LOW|			//Clock polarity selection bit
									 mskSPI_MLSB_MSB;								//MSB/LSB selection bit

	//SPI1 SEL0 setting
	SN_SPI1->CTRL0_b.SELDIS = SPI_SELDIS_DIS; 			//Auto-SEL disable bit
	FLASH_SEL_OUTPUT;
	FLASH_SEL_SET;
	SN_SPI1->IE_b.RXFIFOTHIE = 1;
	//SPI1 Fifo reset
	__SPI1_FIFO_RESET;
	
	//SPI1 enable	
	SN_SPI1->CTRL0_b.SPIEN  = SPI_SPIEN_EN;    			//SPI enable bit	
}

/*****************************************************************************
* Function		: SPI1_Enable
* Description	: SPI1 enable setting
* Input			: None
* Output		: None
* Return		: None
* Note			: None
*****************************************************************************/
void SPI1_Enable(void)
{
	SN_SYS1->AHBCLKEN_b.SPI1CLKEN = 1;							//Enable clock for SPI1.
  SN_SPI1->CTRL0_b.SPIEN = SPI_SPIEN_EN;    			//SPI enable bit
	__SPI1_FIFO_RESET;
}

/*****************************************************************************
* Function		: SPI1_Disable
* Description	: SPI1 disable setting
* Input			: None
* Output		: None
* Return		: None
* Note			: None
*****************************************************************************/
void SPI1_Disable(void)
{
  SN_SPI1->CTRL0_b.SPIEN  = SPI_SPIEN_DIS;    		//SPI disable bit
	SN_SYS1->AHBCLKEN_b.SPI1CLKEN = 0;							//Disable clock for SPI1.
}
/*****************************************************************************
* Function		: SPI1_RW
* Description	: SPI1 read and write
* Input			: None
* Output		: None
* Return		: None
* Note			: None
*****************************************************************************/
uint8_t SPI1_RW(uint8_t dat)
{
	SN_SPI1->DATA = dat;
	while(SN_SPI1->STAT_b.BUSY == 1);
	
	return SN_SPI1->DATA;
}
